[E-voting] The VVAT Debate - Technical or Not ?

Michael McMahon michaelmcmahon at vodafone.ie
Tue Mar 9 10:10:14 GMT 2004


Patrick O'Beirne wrote:
> At 15:11 08/03/2004, Michael McMahon wrote:
> 
>>  A 50% chance means checking 50% of
>> constituencies, or ballots whatever.
>> A 90% chance means checking 90% etc.
> 
> 
> 
> No, no. If there was a statistician on this list, they could quote their 
> sampling tables. Depending on the assumptions about distribution of 
> errors you could take from 1% to 100% sample also depending on how risk 
> averse you were.
> 

The key point is the "assumptions about distribution of errors" and a statistician
(alone) can't determine that.

If you develop a software product, with say 100 features, do you only test
a sample of the 100 features, or do you test all 100?

If an accountant audits the books of a company, would the shareholders
be happy if the accountant only checked a sample of the records?







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